cv1

cv1 refers to the first cervical vertebra, also known as the atlas. It is the uppermost vertebra in the spinal column and is unique in its structure. Unlike other cervical vertebrae, cv1 lacks a vertebral body and a spinous process. Instead, it has a ring-like structure consisting of anterior and posterior arches, with lateral masses that articulate with the occipital bone of the skull. This articulation allows for nodding movements of the head, such as saying "yes." The atlas also articulates with the axis, the second cervical vertebra (cv2), which allows for rotational movements of the head, such as saying "no." The vertebral foramen of cv1 is large and contains the spinal cord. This structure is crucial for supporting the head and facilitating its movement. Damage to cv1 can have severe consequences due to its proximity to the brainstem and spinal cord.